Tubeworm Artificial Settlement Cubes (IMAGE) Penn State Caption Tubeworm artificial settlement cubes after one year deployment at the East Pacific Rise in 2500 m depth. Credit Credit: Andrea D. Nussbaumer, Charles R. Fisher and Monika Bright Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.